Trait ScalarRef

pub trait ScalarRef<'a>:
    ScalarBounds<ScalarRefImpl<'a>>
    + 'a
    + Copy {
    type ScalarType: Scalar<ScalarRefType<'a> = Self>;

    // Required methods
    fn to_owned_scalar(&self) -> Self::ScalarType;
    fn hash_scalar<H: Hasher>(&self, state: &mut H);
}

ScalarRef is a trait over all possible references in the evaluation framework.

ScalarRef is reciprocal to Scalar. Use to_owned_scalar to get an owned scalar.

Required Associated Types

type ScalarType: Scalar<ScalarRefType<'a> = Self>

ScalarType is the owned type of current ScalarRef.

Required Methods

fn to_owned_scalar(&self) -> Self::ScalarType

Convert ScalarRef to an owned scalar.

fn hash_scalar<H: Hasher>(&self, state: &mut H)

A wrapped hash function to get the hash value for this scaler.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl ScalarRef<'_> for bool

Implement ScalarRef for bool.

type ScalarType = bool

fn to_owned_scalar(&self) -> bool

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'a> ScalarRef<'a> for &'a str

Implement ScalarRef for Box<str>. Box<str> could be converted to &str.

type ScalarType = Box<str>

fn to_owned_scalar(&self) -> Box<str>

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'a> ScalarRef<'a> for &'a [u8]

type ScalarType = Box<[u8]>

fn to_owned_scalar(&self) -> Box<[u8]>

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'scalar> ScalarRef<'scalar> for i16

type ScalarType = i16

fn to_owned_scalar(&self) -> Self

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'scalar> ScalarRef<'scalar> for i32

type ScalarType = i32

fn to_owned_scalar(&self) -> Self

fn hash_scalar<H: Hasher>(&self, state: &mut H)

impl<'scalar> ScalarRef<'scalar> for i64

type ScalarType = i64

fn to_owned_scalar(&self) -> Self

fn hash_scalar<H: Hasher>(&self, state: &mut H)

Implementors

impl ScalarRef<'_> for Decimal

Implement ScalarRef for Decimal.

type ScalarType = Decimal

impl ScalarRef<'_> for Date

Implement ScalarRef for Date.

type ScalarType = Date

impl ScalarRef<'_> for Interval

Implement ScalarRef for Interval.

type ScalarType = Interval

impl ScalarRef<'_> for Time

Implement ScalarRef for Time.

type ScalarType = Time

impl ScalarRef<'_> for Timestamp

Implement ScalarRef for Timestamp.

type ScalarType = Timestamp

impl ScalarRef<'_> for Timestamptz

Implement ScalarRef for Timestamptz.

type ScalarType = Timestamptz

impl<'a> ScalarRef<'a> for StructRef<'a>

Implement Scalar for StructValue.

type ScalarType = StructValue

impl<'a> ScalarRef<'a> for ListRef<'a>

Implement Scalar for ListValue.

type ScalarType = ListValue

impl<'a> ScalarRef<'a> for MapRef<'a>

type ScalarType = MapValue

impl<'a> ScalarRef<'a> for Int256Ref<'a>

type ScalarType = Int256

impl<'a> ScalarRef<'a> for JsonbRef<'a>

type ScalarType = JsonbVal

impl<'scalar> ScalarRef<'scalar> for Serial

type ScalarType = Serial

impl<'scalar> ScalarRef<'scalar> for F32

type ScalarType = OrderedFloat<f32>

impl<'scalar> ScalarRef<'scalar> for F64

type ScalarType = OrderedFloat<f64>